CN201956908U - Control device of converter - Google Patents

Abstract

The utility model discloses a control device of a converter. A first DSP (Digital Signal Processor) module is externally connected with a communication interface module, a data bus and an address bus are connected with a first FPGA (Field Programmable Gata Array) module for receiving and transmitting various communication data, the first FPGA module is connected with the first DSP module and a second DSP module to process data exchange with the first DSP module and the second DSP module, the first FPGA module is connected with a second FPGA module to process the transmitting and receiving of a control signal, a DRAM (Dynamic Random Access Memory) module is respectively connected with the first DSP module and the second DSP module to realize the data transmission of the first DSP module and the second DSP module, and the second DSP module is connected with an A/D (Analogue/Digital) module, a D/A (Digital/Analogue) module, the first FPGA module and the second FPGA module. According to the technical scheme, the control device of the converter has the advantages that the abilities of data collecting and outputting are strong, the universality is very strong, various communication functions and interfaces are provided, and the requirement in various industrial application occasions can be satisfied.

Description

A kind of current transformer control device

Technical field

The utility model relates to a kind of device that current transformer is controlled, and especially relates to a kind of DSP of employing and the FPGA universal current transformer control device as the control core, is widely used in all kinds of electric power systems.

Background technology

Development along with power electronic technology, convertor assembly and big capacity dynamic load with nonlinear characteristic are widely used, harmonic pollution in the electrical network and idle problem become serious day by day, influenced the safe operation of electrical network and the normal electricity consumption of industrial and agricultural production, suppressed mains by harmonics and become a urgent problem with reactive power compensation.

The basic principle of static reacance generator (SVG) is by the suitable control to controllable power semiconductor device (IGBT) in the commutation bridge circuit, dc voltage is converted to the output voltage of AC side and electrical network same frequency, the phase place that makes its source current is leading or quadrature lagging than voltage, SVG is sent or absorbing reactive power, realize dynamic passive compensation.

The basic principle of Active Power Filter-APF (APF) is by the harmonic current in the detection of grid, utilize the electric current that controlled power semiconductor (IGBT) injects with the system harmonics current amplitude equates, phase place is opposite in electrical network, making the total harmonic wave in the electrical network is zero, thereby reaches the purpose of real-Time Compensation harmonic current.

Know by above-mentioned, SVG and APF apparatus control system complexity, need carry out a large amount of arithmetic operators and control logic handles, common ground all need to be high-power converter (IGBT module) is carried out control and on-line condition monitoring, and therefore the development at the suitable control system of current transformer seems very necessary.

SVG device and the used current transformer of APF device are two used core components of device, become the reliable and stable operation of these two devices at the control technology of these two core components and guarantee.Research to converter control system both at home and abroad has various scheme, and therefore various controlling platform framework is just arranged.At present, generally adopt the controlling platform framework of single DSP+ single FPGA both at home and abroad, and formed the volume production of certain scale, but this all is at personalized low capacity, the minority current transformer, the controlling platform that communication modes is single, along with core apparatus to multipleization, big capacity such as chain structure, most current transformers, the direction of multimode communication develops, and existing various platforms can not meet the demands far away, need carry out the extensive again framework and the design of platform, therefore, we have designed all kinds of device general convertor controlling platform at the types of applications situation, satisfy present real-time control and monitoring at all kinds of converter devices.

The technical scheme comparatively similar to the utility model mainly contains following several:

Prior art 1 is that the Beijing Artime Intelligent Control Co., Ltd applied on November 20th, 2008, and it is open on 04 08th, 2009, publication number is the Chinese patent application of CN101404457A, a kind of AC-AC frequency conversion current digital control system based on DSP and FPGA, by the DSP mainboard, the FPGA interface board, based on VME bus host computer, the synchronizing voltage interface circuit, the pulsed drive interface circuit, the A/D interface circuit of sampling, synchrotrans, the pulse-triggered power board, voltage-current sensor is formed, the DSP mainboard mainly carries out current regulator, the calculating of discontinuous current compensation and trigger angle, the FPGA interface board is responsible for and master system, synchrotrans, voltage, the current detecting device, the current over-zero check-out console, pulse-triggered power board interface.The technical scheme DSP control board that this utility model adopts separates with the FPGA interface board, and carries out exchanges data by two RAM of FPGA inside, has strengthened the working strength of FPGA, is unfavorable for that system controls in real time, and the two RAM chips of application specific are carried out exchanges data.

Prior art 2 is a Shanghai Power Equipment Research Institute, Shanghai Keda Electric Control Co., Ltd. applied on December 30th, 2008, and it is open on 06 17th, 2009, publication number is the Chinese patent application of CN101459404A, a kind of excitation system intelligent power cabinet adjustable plate based on DSP and FPGA, comprise the three-phase pulse circuits for triggering, it is characterized in that, the three-phase pulse circuits for triggering connect fpga chip, fpga chip connects three phase synchronization detecting circuits, dsp chip, photoelectricity is isolated digital quantity signal, fiber-optic signal, the D/A modular converter, the A/D modular converter, above-mentioned connection is all two-way connection.The single DSP+ single FPGA of the technical scheme that this utility model adopts chip controls finite capacity is unfavorable for the control and the externally communication of large-capacity transducer.

Prior art 3 is that China Electric Power Research Institute was in application on 09 13rd, 2005, and it is open on 05 03rd, 2006, publication number is the Chinese patent application of CN1766775A, adjustable plate based on the Static Var Compensator of floating point DSP and FPGA is mainly combined by 32 floating point DSPs and FPGA.Also comprise auxiliary external equipments such as 40 tunnel 14 modulus conversion chips, digital phase-locked loop PLL, CAN controller and 8 road photoelectricity isolation imput output circuit.All circuit is integrated on pluggable 4 layer printed circuit boards, realizes that cpu bus does not go out circuit board.This circuit board adopts 4 layers of wiring, crystal art, and the Surface Mount circuit, European plug connector, anti-electromagnetic interference reaches electromagnetic compatibility standard EMC fast transient 4 grade standards, but online programming.The technical scheme analog acquisition precision that this utility model adopts is limited, and communication function is variation inadequately, has only the CAN controller.

Therefore in the prior art, all carry out data processing, pwm pulse generation, communication interface separately with single DSP+ single FPGA chip, make that the operating mode of existing chip is comparatively complicated, cause the excessive use of existing platform acp chip easily, thereby cause the instability of platform operation and unreliable.Therefore at these shortcomings, reach under the situation of standard in the anti-electromagnetic interference that guarantees quick computational accuracy and computational speed and platform, it is more reasonable to design a kind of division of labor, computational speed is faster, computational accuracy is higher, signaling interface and communication modes are more, and the better current transformer controlling platform of reliability and stability becomes the prior art problem demanding prompt solution.

The utility model content

The purpose of this utility model provides a kind of current transformer control device, can apply to the real-time control of converter module, realizes multipleization PWM control, has the communication function of multiple mode simultaneously, satisfies the universal controlling platform of types of applications converter device.

The utility model specifically provides a kind of embodiment of current transformer control device, a kind of current transformer control device, comprise: a DSP module, the 2nd DSP module, a FPGA module, the 2nd FPGA module, DRAM module, communication interface module, A/D module and D/A module, the external communication interface module of the one DSP module, the data/address bus of the one DSP module links to each other with a FPGA module with address bus, receives and send various communication datas; The one a FPGA module and a DSP module, the 2nd DSP module links to each other, and with a DSP module, the 2nd DSP module is carried out exchanges data, and a FPGA module links to each other with the 2nd FPGA module, carries out the control signal biography and connects; The DRAM module respectively with a DSP module, the 2nd DSP module links to each other, and realizes the exchanges data of a DSP module and two master control chip chambers of the 2nd DSP module; The 2nd DSP module and A/D module, the D/A module, a FPGA module, the 2nd FPGA module links to each other.

As the further execution mode of a kind of current transformer control device of the utility model, the one FPGA module is responsible for the control logic of a DSP module and two master control chips of the 2nd DSP module, digital signal is gone into out, the signal processing of synchronizing signal input, by carrying out exchanges data with a DSP module and to master-slave mode RS485 communication interface module, the eCAN communication interface module, the sheet selected control system of USB communication interface module and ethernet communication interface module, transmit communication data in real time, by logic control to the 2nd DSP module and the 2nd FPGA module, carry out the data sampling of A/D module and D/A module, the I/O signals collecting, a FPGA module is carried out sheet selected control system to the DRAM module.

As the further execution mode of a kind of current transformer control device of the utility model, the current transformer control device comprises that numeral goes into out module, the current transformer control device is gone into out the on off state amount of module by input digit, read in and comprise air switch, circuit breaker is at interior on off operating mode, go into out the break-make of the on off state output control output relay of module again by numeral, thereby control comprises the switch of circuit breaker, the input signal that numeral is gone into out module at first carries out rectification by rectifying tube, light-coupled isolation is carried out by the optocoupler module in the back, converts to through level shifting circuit and gives a FPGA module behind the 3.3V voltage signal and read.

As the further execution mode of a kind of current transformer control device of the utility model, the current transformer control device comprises the signal condition module, the signal condition module at first is transformed to voltage signal with the current signal of transducer, pass through the frequency overlapped-resistable filter of forming by the second-order low-pass filter circuit again, be transformed to the voltage signal of 0～9V, export the A/D modular converter at last to and read.

As the further execution mode of a kind of current transformer control device of the utility model, the current transformer control device comprises optical fiber input module and optical fiber output module, optical fiber input module and optical fiber output module are connected between current transformer control device and the converter module, the pwm control signal that is produced by the modulation of the 2nd FPGA module is converted to the 5V voltage signal through level shifting circuit after after the overdrive circuit driving, drive converter module by optical fiber output, output pwm signal connects pull down resistor.

As the further execution mode of a kind of current transformer control device of the utility model, the 2nd FPGA module is responsible for phase shift, distribution and the generation of pwm pulse, receive the light pulse signal of converter module operating state simultaneously, carry out delivering to the 2nd DSP module after the logical process, realize real-time control whole converter module.

As the further execution mode of a kind of current transformer control device of the utility model, the analog signal that the 2nd DSP module is responsible for gathering electrical network and converter module, output reference waveform to the two FPGA modules, the 2nd FPGA module receives the light signal of converter module feedback simultaneously, thus the idle and real-time monitoring converter module state of control electrical network.

As the further execution mode of a kind of current transformer control device of the utility model, communication interface module comprises master-slave mode RS485 communication interface module, the eCAN communication interface module, usb interface module and ethernet interface module, master-slave mode RS485 communication interface module, the eCAN communication interface module, usb interface module all links to each other with a DSP module with ethernet interface module.

As the further execution mode of a kind of current transformer control device of the utility model, the chip of a DSP module and the 2nd DSP module adopts the TMS320F2812 of TI; The chip of a described FPGA module and the 2nd FPGA module adopts the EP3C25F324 of Altera.

As the further execution mode of a kind of current transformer control device of the utility model, the input and output processing signals of a FPGA module comprises 16 road digital quantity input signals, 8 road digital quantity output signals, 3 road voltage synchronizing signals, 3 road hardware fault protection input circuits and 4 AD controlling of sampling logics; Described the 2nd DSP module is gathered analog signals, comprise 12 tunnel sensor acquisition amounts, be used to detect converter module direct voltage and converter module output current signal, No. 12 instrument transformer collection capacities, be used for converter module bus current and bus voltage signal, 4 tunnel 12 DA outputs are used for the data volume observation on the program debugging process bus.

By implementing the embodiment of a kind of current transformer control device of the utility model, make the current transformer control device possess powerful data acquisition and fan-out capability, versatility is very strong simultaneously, and possesses various communication functions and interface, can satisfy various industrial applications needs.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the system architecture diagram of a kind of current transformer control device of the utility model;

Fig. 2 is the processor part-structure block diagram of a kind of current transformer control device of the utility model;

Fig. 3 is the circuit theory diagrams of a kind of current transformer control device of the utility model signal conditioning circuit;

Fig. 4 is the circuit theory diagrams of a kind of current transformer control device numeral of the utility model I/O circuit;

Fig. 5 is the circuit theory diagrams of a kind of current transformer control device of the utility model optical fiber transmission circuit;

Wherein: 1-the one DSP module, 2-the 2nd DSP module, 3-the one FPGA module, 4-the 2nd FPGA module, the 5-DRAM module, the 6-numeral is gone into out module, 7-signal condition module, 8-A/D module, 9-D/A module, 10-optical fiber output module, 11-optical fiber input module, 12-RS485 communication interface primary module, 13-RS485 communication interface is from module, 14-USB communication interface module, 15-ethernet communication interface module, the 16-eCAN communication interface module, the 17-communication module.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

As the embodiment of a kind of current transformer control device of the utility model, current transformer control device as shown in Figure 1 mainly comprises the master control module, the signal condition module, and the optical fiber input module, the optical fiber output module, numeral is gone into out module.In the frame diagram, each frame of broken lines is each minute plate functional module, and each functional module for master control module board plug-in unit in the solid box distributes.

Each functions of modules principle is described below:

(1) the one DSP module 1: external 2 road RS485 communication interfaces of this module, 1 road eCAN communication interface, one tunnel USB interface and one road Ethernet interface, its data/address bus links to each other with a FPGA module with address bus, receives and send the data of various communication modes.

(2) RS485 communication interface primary module 12 and RS485 communication interface are from module 13: a kind of master-slave communication mode links to each other with a DSP module and to carry out communication.

(3) the USB communication interface module 14: the general serial communication modes links to each other the row communication of going forward side by side with a DSP module.

(4) communication interface module 15 Ethernet(Ethernet): ethernet communication links to each other with a DSP module and to carry out communication.

(5) the one FPGA modules 3: carry out exchanges data with a DSP module and the 2nd DSP module, the biography of carrying out associated control signal between while and the 2nd FPGA module connects, by and a DSP module between exchanges data and to the USB communication interface module, RS485 communication interface primary module and RS485 communication interface are from module, the sheet selected control system of communication modules such as ethernet communication interface module, reach the purpose of real-time transmission communication data, by with the logic control of the 2nd DSP module and the 2nd FPGA module, reach the data sampling of A/D module and D/A module, functions such as I/O signals collecting are also carried out sheet selected control system to DRAM module dual-ported memory simultaneously.

(6) the DRAM module 5: by connecting a DSP module and the 2nd DSP module, realize the exchanges data of two master control chip chambers.

(7) the I/O(numeral is gone into out) module 6: link to each other with a FPGA module, carry out the I/O signal data by a FPGA module and handle.

(8) the signal condition module 7: the signal after conditioned is sent into the A/D module.

(9) the A/D module 8: the conversion of signals that the signal condition module is sent into is that digital signal is sent into the 2nd DSP module and handled, and the sheet choosing of A/D module and read-write sequence are by a FPGA module controls.

(10) the D/A module 9: receive the data-signal of the 2nd DSP module, and by the logic chip selected control system of a FPGA module, the output analog signal.

(11) the 2nd DSP modules 2: the numeral that A/D module and FPGA_1 module biography are come on the reception converter module is gone into out signal, and through data algorithm, output control pwm signal to the two FPGA modules reach the purpose of controlling converter module.Simultaneously carry out exchanges data with a FPGA module, DRAM module.

(12) the 2nd FPGA modules 4: by receiving the pwm signal of the 2nd DSP module, handle the light signal that the back generates the control converter module, receive converter module state light signal simultaneously the current transformer state is carried out on-line monitoring, carry out exchanges data with a FPGA module, externally communication adopts the optical-fibre communications pattern to isolate communication.

(13) optical fiber input module 11 and optical fiber output module 10: the optical fiber input module is that the signal of telecommunication is given the 2nd FPGA module and handled with converter module state light conversion of signals, and the current transformer control level conversion of signals that the optical fiber output module transmits the 2nd FPGA module is light signal output.

(14) communication module 17: carry out light by the 2nd FPGA module and the external world and isolate communication, transmit the state of converter module.

Wherein, the dsp chip of the one DSP module and the 2nd DSP module adopts the TMS320F2812 of TI company, this chip is 32 fixed-point DSP chip of a high-performance released in recent years of TI company, multi-functional, high performance-price ratio, is one of state-of-the-art processor of present industrial control field.Its dominant frequency reaches as high as 150MHz, and reaching the single instruction cycle is 6.67ns, has improved the control precision of control system and the disposal ability of chip, can well satisfy the requirement of real-time control of static reacance generator.And this chip also provides the floating-point mathematics function library, makes it possible to realize easily on fixed-point processor floating-point operation.

Main performance and the technical characterictic of F2812 are as follows:

(1) the static CMOS technology of high-performance: 6.67ns instruction cycle (150MHz), low-power consumption (core voltage 1.8V, I/O mouth voltage 3.3V); Flash program voltage 3.3V.

The Flash memory (access time 36ns) of (2) on-chip memory: 128K * 16; 18K * 16 a single port random asccess memory (SARAM); 1K * 16 an OTP type read-only memory.

(3) external memory interface: can extend out program and data storage greater than 1M * 16; Wait state able to programme; Read/write gated counter able to programme; Three sheet choosing ends independently.

(4) two task managers (EV) module: each module comprises 2 16 general purpose timers respectively, and 3 comparative units can be used as 6 tunnel pulse-width modulations (PWM) passage, three units of catching (CAP), 2 road quadrature coding pulse circuit (QEP) etc.

(5) 12 ADC:2 * 8 passages (the fastest change-over time 80ns).

(6) peripheral communication interface: 2 road SCI, 1 road SPI, 1 road McBSP, 1 road eCAN etc.

(7) three external interrupt.

(8) external interrupt expansion (PIE) module: can support 96 external interrupt.

(9) 3 32 CPU timer.

Wherein, the fpga chip of a FPGA module and the 2nd FPGA module adopts the EP3C25F324 in the up-to-date Cyclone III series of altera corp, and this chip makes the user can realize the high-level design function neatly, raises the efficiency.Low-power consumption, low cost and high-performance have been realized simultaneously.

Main performance and the technical characterictic of EP3C25F324 are as follows:

(1) has 24624 LE, have very high level of integrated system.

(2) embedded memory module is up to 66, and total 594Kbits is applicable to that big capacity storage uses, for example video line buffering etc.

(3) performance of embedded multiplier reaches 66 18 * 18 embedded multipliers of 260MHz, is applicable to broadband parallel processing application.

(4) external memory interface is supported the high speed external memory interface, comprise DDR DDR2 SDR SDRAM and QDR2SDRAM, speed way 400Mbps.Self calibration external memory interface PHY has simplified sequential and has approached, and has eliminated the deviation that technology, voltage and temperature (PVT) etc. causes.

(5) have 4 phase-locked loops (PLL), each PLL has 5 tunnel outputs, realizes 20 global clocks, supports dynamically reconfiguring of frequency and phase change.

(6) the differential signal support does not need non-essential resistance up to the LVDS signal that 875Mbps receives and 840Mbps sends, and can use low-swing difference signal (RSDS), LVDS and point-to-point differential signal (PPDS).

(7) easy parallel configuration provides low-cost config option.

(8) the automatic detection circuit of SEU adopts 32 to be the automatic detection circuit of Cyclic Redundancy Check single event interference (SEU).

(9) hot plug and the ordering support that powers in the powerful sheet guarantees that the device operate as normal is not subjected to the influence of electric sequence.

As shown in Figure 1, a DSP module is responsible for the communication function of all parameters of platform, and wherein RS485_1, RS485_2, USB, Ethernet, eCAN select corresponding communication function as external communication interface for use according to user's specific requirement; The analog signal that the 2nd DSP module is responsible for gathering electrical network and converter module, output reference waveform to the two FPGA modules, the 2nd FPGA module receives the light signal of converter module feedback simultaneously, reaches the purpose of control electric network reactive-load and real-time monitoring converter module state; Realize exchanges data by the DRAM module between the one DSP module and two dsp chips of the 2nd DSP module.The one FPGA module is responsible for signal processing such as control logic, the digital signal of two dsp chips are gone into out, synchronizing signal input; The 2nd FPGA module is responsible for phase shift, distribution and the generation of pwm pulse, receives the status signal of converter module simultaneously, does and delivers to the 2nd DSP module after interrelated logic is handled, and reaches the real-time control to whole converter module.

The communication interface of current transformer control device mainly comprises the RS485 communication interface module of master-slave mode, eCAN communication interface module 16, usb interface module 14 and ethernet interface module 15, master-slave mode RS485 communication interface module, the eCAN communication interface module, usb interface module all links to each other with a DSP module with ethernet interface module.On input/output interface, the current transformer control device that the utility model embodiment is described comprises: 24 tunnel 16 high-precision analog amounts collections at a high speed; 4 way word revolving dies are intended output; The input of 16 road digital quantities; The output of 8 road digital quantities; The output of 24 road pwm signals; 56 tunnel convertible optical fiber input and output signal interfaces; A pair of external communication optical fiber interface; 2 road RS485,1 road USB, 1 road Ethernet, the external communication interface of 1 road eCAN.

As shown in Figure 2, the current transformer control device of the utility model embodiment description adopts the platform framework of two DSP+ double FPGAs.Wherein, realize exchanges data by a DRAM module or a FPGA module between the one DSP module and the 2nd DSP module, the one FPGA module realizes the exchanges data with the 2nd FPGA module simultaneously as the middle tie of control the one DSP module and the 2nd each functional module of DSP module.The 2nd FPGA module realizes the data processing with the 2nd a DSP module and a FPGA module.

The one FPGA module mainly is responsible for the collection of digital signal amount and the protection work of whole system.The accessible digital signal of the one FPGA module mostly is 50 the tunnel most, comprising 16 road digital quantity input signals, 8 road digital quantity output signals (can expand to 32 road digital quantity input signals, 12 road digital quantity output signals), 3 road voltage synchronizing signals, 3 road hardware fault protection input circuits; Be responsible for the control logic of 4 AD chip samplings simultaneously, also manage the control logic of DRAM module simultaneously, realize a DSP module and the 2nd DSP module real-time exchange data.

The 2nd FPGA module is responsible for phase shift, distribution and the generation of pwm pulse.Exportable 24 road pwm pulses, required for the work of 4 3-phase power converter modules.Gather the light pulse signal of converter module operating state simultaneously, reach the purpose of real-time monitoring.56 road optical fiber receiving loops have been designed on the hardware.Also subsidiary one tunnel optical fiber communication function of other the 2nd FPGA module.The one DSP module is responsible for all communication functions of controlling platform, comprises one road USB communication, one road Ethernet communication, Ecan communication, two-way RS485 communication.The 2nd DSP module is responsible for gathering all relevant analog signalses of this control system, gathers path and reaches 24 the tunnel.Wherein the sensor acquisition amount 12 the tunnel, are mainly used in the variation direct voltage, the current transformer output current signal faster that detect current transformer itself; Instrument transformer collection capacity 12 tunnel is mainly used in detection system bus current, bus voltage signal.Also design 4 tunnel 12 DA output module in addition on the hardware, made things convenient for the observation of the data volume on the bus in the program debugging process.

Wherein, the USB communication interface module adopts the high speed of CYPRESS company, chip CY7C68001 cheaply.This USB communication interface module is supported the USB2.0 interface, simultaneously compatible USB1.1.The maximum data transmission rate 480MBps, integrated USB2.0 transceiver (physical layer), USB2.0 serial interface engine SIE(link layer, test basic communication protocol).

The controller that Ethernet ethernet communication interface module adopts is the CS8900A cheaply that is used for embedded device.CS8900A comprises RAM on the sheet, 100Base-T transmission and receiving filter, and 8 or 16 two kinds of interfaces are provided.The outstanding characteristics of this Ethernet communication just are to use flexibly, and its physical layer interface, data-transmission mode and mode of operation etc. can as required and dynamically be adjusted, and adapt to different environment by internal register setting.

The Ecan communication interface module adopts the CAN transceiver SN65HVD251 of American TI Company, and it is fast that this chip has communication speed, and compatible strong, characteristics such as low-power consumption are widely used in the communications field.The complete compatible CAN2.0B agreement of this communication interface module is supported the transmission rate up to 1Mbps; Strong interference immunity can have interference environment in the normal transmission data; Nearly 32 mailboxes make that transfer of data is convenient flexibly, big increasing contains much information.

The RS485 communication is the communication modes the most widely that present industrial control field adopts.The utility model embodiment adopts the common-mode transceiver SN65HVD20D of American TI Company; it is big that this chip has input voltage range; characteristics such as noise immunity is good, low in energy consumption; and can suppress the instantaneous overvoltage that thunder and lightning and other reasons produce in the line, the protection interface circuit is avoided damaging.In order to realize the isolation of bus and external signal, will adopt optocoupler HCPL-0631-500E to isolate between the asynchronous communication mouth of outside and 485 chips.Present design is supported EIA RS-485 standard, is fit to long-distance transmissions, the longlyest can be 9.6 kilometers.

The current transformer control device that the utility model embodiment is described has multichannel various types of signal interface, comprising: 24 tunnel 16 high-precision analog amounts collections at a high speed; 4 way word revolving dies are intended output; The input of 16 way words, the output of 8 way words; The output of 24 road pwm signals; 56 tunnel convertible optical fiber input and output signal interfaces, 2 tunnel external communication optical fiber interfaces.

The power supply of current transformer control device is finished by power insert.Power insert is DC110V input, suppresses behind circuit and the power module output+5V and ± 15V through EMI, and power is 120W.

Signal conditioning circuit: be effectively to regulate current transformer major loop output voltage, electric current and power factor etc., what need to detect has signals such as three-phase voltage, current signal and dc tache voltage.In view of the demand of this controlling platform sampling precision and sampling rate, select the AD7656 of Analog Device company for use.This device is 16 A/D converters of 6 passage synchronized samplings of a high speed, low-power consumption.Acquisition Circuit at first is transformed to voltage signal with the current signal of transducer, the frequency overlapped-resistable filter through forming by the second-order low-pass filter circuit again, and the voltage signal that is transformed to 0～9V is given AD7656 and is read, as shown in Figure 3.

The I/O(numeral is gone into out) circuit: controlling platform is read on off operating modes such as major loop air switch, circuit breaker by the input of on off state amount, by the switches such as break-make control major loop circuit breaker of on off state output and control output relay.Present design input alternating current-direct current 110V to 220V, have very wide input voltage range, input signal is at first by rectifying tube MB6S rectification, after isolate through TLP521 light lotus root, become to give FPGA1 behind the 3.3V voltage signal and read through level conversion again, as shown in Figure 4.

Optical fiber input and optical fiber output circuit: the pwm control signal that the modulation of the 2nd FPGA module produces is to drive the back by SN75452 behind the 5V signal to adopt optical fiber HFBR1521 output to drive converter module through level conversion.Optical fiber is isolated between general controls platform and the converter module, has realized the high-low pressure isolation, has also eliminated the interference of outside high-frequency signals to pwm signal simultaneously.Output pwm signal connects pull down resistor avoided reseting period or FPGA to download during because of the indefinite switching device that causes of pwm signal state misleads, as shown in Figure 5.

The current transformer control device that the utility model embodiment is described has powerful data acquisition function.The current transformer control device can be gathered maximum 24 tunnel analog quantitys and 32 road digital quantity signals, and exportable 12 road digital quantity switching signals can be adopted 56 road collecting fiber loops at most at most.Various communication functions are complete.This controlling platform comprises USB, Ethernet, Ecan, RS485 communication interface, can satisfy various industrial applications needs.Versatility is stronger.Be equipped with 24 tunnel pulse generation paths and hardware protection passage in the current transformer control device, can have satisfied the control requirement of multiple occasion.Be easy to software programming.General C language and VHDL language developed the transplanting of very convenient program in the DSP of current transformer control device, the FPGA program employing control field.The speed of data processing and exchange is very fast, and is real-time.The high-speed computation kernel of FPGA and DSP has guaranteed the speed of data processing.Cost is low, is fit to use in batches, and the DSP of employing and fpga chip all are the control chips that industry is popular and price is low, effectively reduces buying difficulty and cost.

The above only is preferred embodiment of the present utility model, is not the utility model is done any pro forma restriction.Though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model.Any those of ordinary skill in the art, do not breaking away under the technical solutions of the utility model scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore; every content that does not break away from technical solutions of the utility model; according to technical spirit of the present utility model to any simple modification that above embodiment did, be equal to replacements, equivalence changes and modify, all still belong in the scope that technical solutions of the utility model protect.

Claims (10)

1. current transformer control device, it is characterized in that: comprise a DSP module, the 2nd DSP module, a FPGA module, the 2nd FPGA module, DRAM module, communication interface module, A/D module and D/A module, the external communication interface module of the one DSP module, the data/address bus of the one DSP module links to each other with a FPGA module with address bus, receives and send various communication datas; The one a FPGA module and a DSP module, the 2nd DSP module links to each other, and with a DSP module, the 2nd DSP module is carried out exchanges data, and a FPGA module links to each other with the 2nd FPGA module, carries out the control signal biography and connects; The DRAM module respectively with a DSP module, the 2nd DSP module links to each other, and realizes the exchanges data of a DSP module and two master control chip chambers of the 2nd DSP module; The 2nd DSP module and A/D module, the D/A module, a FPGA module, the 2nd FPGA module links to each other.

2. a kind of current transformer control device according to claim 1, it is characterized in that: a described FPGA module is responsible for the control logic of a DSP module and two master control chips of the 2nd DSP module, digital signal is gone into out, the signal processing of synchronizing signal input, by carrying out exchanges data with a DSP module and to master-slave mode RS485 communication interface module, the eCAN communication interface module, the sheet selected control system of USB communication interface module and ethernet communication interface module, transmit communication data in real time, by logic control to the 2nd DSP module and the 2nd FPGA module, carry out the data sampling of A/D module and D/A module, the I/O signals collecting, a FPGA module is carried out sheet selected control system to the DRAM module.

3. a kind of current transformer control device according to claim 1 and 2, it is characterized in that: described current transformer control device comprises that numeral goes into out module, the current transformer control device is gone into out the on off state amount of module by input digit, read in and comprise air switch, circuit breaker is at interior on off operating mode, go into out the break-make of the on off state output control output relay of module again by numeral, thereby control comprises the switch of circuit breaker, the input signal that numeral is gone into out module at first carries out rectification by rectifying tube, light-coupled isolation is carried out by the optocoupler module in the back, converts to through level shifting circuit and gives a FPGA module behind the 3.3V voltage signal and read.

4. a kind of current transformer control device according to claim 3, it is characterized in that: described current transformer control device comprises the signal condition module, the signal condition module at first is transformed to voltage signal with the current signal of transducer, pass through the frequency overlapped-resistable filter of forming by the second-order low-pass filter circuit again, be transformed to the voltage signal of 0～9V, export the A/D modular converter at last to and read.

5. a kind of current transformer control device according to claim 4, it is characterized in that: described current transformer control device comprises optical fiber input module and optical fiber output module, optical fiber input module and optical fiber output module are connected between current transformer control device and the converter module, the pwm control signal that is produced by the modulation of the 2nd FPGA module is converted to the 5V voltage signal through level shifting circuit after after the overdrive circuit driving, drive converter module by optical fiber output, output pwm signal connects pull down resistor.

6. a kind of current transformer control device according to claim 5, it is characterized in that: described the 2nd FPGA module is responsible for phase shift, distribution and the generation of pwm pulse, receive the light pulse signal of converter module operating state simultaneously, carry out delivering to the 2nd DSP module after the logical process, realize real-time control whole converter module.

7. according to claim 5 or 6 described a kind of current transformer control device, it is characterized in that: the analog signal that described the 2nd DSP module is responsible for gathering electrical network and converter module, output reference waveform to the two FPGA modules, the 2nd FPGA module receives the light signal of converter module feedback simultaneously, thus the idle and real-time monitoring converter module state of control electrical network.

8. a kind of current transformer control device according to claim 7, it is characterized in that: described communication interface module comprises master-slave mode RS485 communication interface module, the eCAN communication interface module, usb interface module and ethernet interface module, master-slave mode RS485 communication interface module, the eCAN communication interface module, usb interface module all links to each other with a DSP module with ethernet interface module.

9. according to the described a kind of current transformer control device of arbitrary claim in the claim 1,2,4,5,6,8, it is characterized in that: the chip of a described DSP module and the 2nd DSP module adopts the TMS320F2812 of TI; The chip of a described FPGA module and the 2nd FPGA module adopts the EP3C25F324 of Altera.

10. a kind of current transformer control device according to claim 9 is characterized in that: the input and output processing signals of a described FPGA module comprises 16 road digital quantity input signals, 8 road digital quantity output signals, 3 road voltage synchronizing signals, 3 road hardware fault protection input circuits and 4 AD controlling of sampling logics; Described the 2nd DSP module is gathered analog signals, comprise 12 tunnel sensor acquisition amounts, be used to detect converter module direct voltage and converter module output current signal, No. 12 instrument transformer collection capacities, be used for converter module bus current and bus voltage signal, 4 tunnel 12 DA outputs are used for the data volume observation on the program debugging process bus.

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